shallow

Young children should only swim in the shallow end of the pool.

(Chinese) 年幼的孩子应该只在泳池的浅水区游泳。

The roots of the cactus are shallow so they can quickly absorb desert rain.

(Chinese) 仙人掌的根很浅，以便快速吸收沙漠中的雨水。

He only dates famous people, which makes him seem very shallow.

(Chinese) 他只和名人约会，这让他显得非常肤浅。

The movie was entertaining, but the characters were too shallow to be believable.

(Chinese) 这部电影很有趣，但角色太单一肤浅，不真实。